Henry's departure wasn't a sickening blow though to be honest Toon. Much as I appreciate what he's done for us, we did enjoy his peak. Had we lost Henry a few years back I'd have been bloody livid but we got a good deal and I thought it was the right time to move on.
Anyhow, back on topic, I do think Owen and Martins will stay. Owen because he hasn't done much at Newcastle yet apart from, as mentioned earlier in the thread, pick up his paycheck. I can't see a better offer coming in anyway - Arsenal would appear to be sorted, United should have better targets in mind and Liverpool are on their way to signing Fernando Torres it would seem. No, I think he'll stay. As for Martins, I doubt there are many clubs out there's who'd be willing to meet his release clause, to be honest, and again it's a case of no better offers unless some foreign club comes in for him but even then, Newcastle are in a good position at the moment.
So no, I expect no player to leave. Allardyce is a very good manager and there is money to be spent, Newcastle are on the up.